Finding the Third Proportional to 9,858.50 and 21,100

Step by Step Solution

1. Step 1: Write the proportion equation
   9,858.50 : 21,100 = 21,100 : x
2. Step 2: Convert to fraction form
   9,858.50/21,100 = 21,100/x
3. Step 3: Cross multiply
   9,858.50x = 21,100 × 21,100
4. Step 4: Simplify right side
   9,858.50x = 445,210,000
5. Step 5: Solve for x
   x = 445,210,000/9,858.50
6. Step 6: Final answer
   x = 45,160.01